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- Among a population of tadpoles, the correlation coefficient for size atmetamorphosis and time required for metamorphosis is −0.74. On thebasis of this correlation, what conclusions can you draw about therelative sizes of tadpoles that metamorphose quickly and those thatmetamorphose more slowly?Ancestors of the beach mouse mayhave exhibited variations in their coat color. Because of the prevalence of visualpredators, the better-camouflaged (lighter) mice in the beach habitat may havesurvived longer and been able to produce more offspring. Over time, a higher andhigher proportion of individuals in the population would have had the adaptation of lighter fur that acted to camouflage the mouse in the beach habitat.Lithobates clamitus. also know as the green frog and bronze frog can range in in skin color from pure to brown to pure green and a mixture of both. As their habitats change frogs with a mixture of both colors have a higher fitness as they are better able to hide from predators. 1. If the change in the distribution of this trait is the result of natural selection, name the mode of selection (ie: Balancing, Disruptive, etc...) 2. If a small group of male frogs end up joining this population from a different population of frogs, which process of selection describes the movement of alleles present in the male frog? 3. The process you named in “c” ________ the genetic variation in the population that the male frog joined? (increase, decrease, or stay the same?)
- A group of 50 men and 50 women establish a colony ona remote island. After 50 generations of random mating,how frequent would a recessive trait be if it were at afrequency of 1/500 back on the mainland? The population remains the same size over the 50 generations, andthe trait has no effect on fitness.ALLOPATRIC SPECIATION a. Does food affect the mating preferences of the fruitflies? b. What would the results be in each generation if a few fruit flies from thesweet potato/pineapplefruit population had been placed in the bananapopulation or vice versa. Explain your prediction.Let us assume that there is a sub-population of wasps that are evolving towards a longer and thinner ovipositor i.e. longer ovipositors are increasing in frequency in the species. Provide a hypothetical natural selection scenario that would result in such a transition from a thick and short ovipositor to a longer and thinner ovipositor. In your answer, you should include pertinent information on: The Original Population2. Selection Pressures3. Differential Reproductive Success4. Selective Advantages5. Direction of Evolution6. Expected pattern of Evolution
- The rough-skinned newt, which lives in western North America, stores a poison in its skin and is avoided by predators. However, several populations of garter snakes have undergone one or a few mutations that enablethem to tolerate the toxin, and these snakes eat the newts with no ill effects. How has natural selection affected this predator–prey relationship? Based on what you have learned about evolutionary arms races, predict what may happen to the newts and the poison-resistant garter snakes over time.Robins typically lay four eggs. Four eggs allow the offspring to be well fed, whereas larger clutches may result in malnourished chicks that have a lower chance of survival. Fewer than four eggs per clutch may result in no surviving offspring if the eggs are preyed upon. Which type of pattern of natural selection MOST LIKELY acts to keep four eggs the most common clutch size?Part A)DR TJ freaks out because she doesn’t hear any cicadas singing in January. If she understood the biology of these animals she would know that was because adult cicadas do not emerge from underground until summer! Dr TJ should have a better understanding of the importance of ___ in studying ecology. timing spatial distributions none of these Part B)If I read 50 papers on phenotypic plasticity in sea stars and they all showed that these animals exhibit behaviors that allow them to persist under temperature stress, this would be an example of ____ in science. detection measurement repeatability
- In the eclectus parrot (Eclectus roratus), mothers sometimes take parental favoritism to extreme lengths by killing their sons, but never their daughters (Heinsohn et al. 2011). Sex-specific infanticide occurs more often at nests that can be flooded during the rainy season. Sons spend longer in the nest than daughters. Link this factor to why it might be adaptive for a parent parrot to kill a son in a vulnerable nest occupied by offspring of both sexes. Don't write from any online source..Two populations of snakes are separated by a river. The snakescross the river only on rare occasions. The snakes in the two populationslook very similar to each other, except that the members ofthe population on the eastern bank of the river have a yellow spoton the top of their head, whereas the members of the western populationhave an orange spot on the top of their head. Discuss twoexperimental methods that you might use to determine whether thetwo populations are members of the same species or members ofdifferent ones.The digger bee’s “postcopulatory courtship” consists of elaborate tactile stimulation that the male provides his partner after she has accepted his sperm. Why is this behavior a Darwinian puzzle, and what might its adaptive value be? Dont' write from any online source.